Technical Field
[0001] The present invention relates to a data processing device capable of recording video
and/or audio data to a recording medium such as an optical disk and a hard disk device
(HDD), and more particularly, to a data processing device connected to a display device
via a communication interface such as HDMI and IEEE 1394 and capable of being remotely
operated by a control signal transmitted from the display device.
Background Art
[0002] Conventionally, a system has been suggested, wherein the system connects a display
device (for example, a television receiver) for receiving television broadcast to
display video and a data processing device capable of recording television broadcast
data via a communication interface, so that the data processing device can be remotely
operated by a control signal transmitted from the display device.
[0003] For example, a recording/reproducing device described in patent document 1 is connected
to a television receiver including a built-in set-top box and can be remotely operated
by a control signal transmitted from the television receiver including the built-in
set-top box. When this recording/reproducing device receives a power-on signal transmitted
from the television receiver including the built-in set-top box while the power of
the recording/reproducing device is off, the recording/reproducing device is turned
on. Further, when the recording/reproducing device receives a timer program recording
signal, the recording/reproducing device records received television broadcast data
to a recording medium therein. It should be noted that, while the recording/reproducing
device is off, this recording/reproducing device does not supply electric power to
an input/output unit, a signal processing unit, a recording unit, and a control unit
but continues to supply electric power to a unit for detecting whether there is any
control signal. When the recording/reproducing device receives the power-on signal
transmitted from the television receiver including the built-in set-top box, the recording/reproducing
device begins to supply electric power to the input/output unit, the signal processing
unit, the recording unit, and the control unit. Not only the remote operation during
power-off but also power saving are achieved by the configuration as described above.
[0004] Patent document 1 also discloses a timer recording registration method with the television
receiver including the built-in set-top box. The method suggested can be applied to
a case where the television receiver including the built-in set-top box transmits
a recording start signal to the recording/reproducing device.
[0005] Generally, a hard disk device (hereinafter referred to as "HDD") needs to perform
spin-up from the stopped state until a recordable state, and it takes time to complete
spin-up. Especially, when the HDD is activated at the power-off state (a state where
no electric power is supplied), it takes more time to complete the spin-up (for example
about 8 to 20 minutes).
[0006]
Patent Document 1: Japanese Patent Laid-Open No. 2004-349790
Patent Document 2: Japanese Patent Laid-Open No. 2006-209941
Disclosure of Invention
Problems to be Solved by the Invention
[0007] In a case where an HDD is used as the recording medium of the recording unit, the
recording/reproducing device described in patent document 1 has a problem in that
the recording/reproducing device cannot immediately start recording when the television
receiver including the built-in set-top box transmits a recording start signal upon
a user's operation on the television receiver including the built-in set-top box to
start recording a program which the user is currently viewing on the television receiver
including the built-in set-top box while the recording/reproducing device is turned
off. This is because it takes more time for the HDD to perform spin-up in a case where
the HDD is activated at the power-off state as described above.
[0008] Always keeping the HDD in a ready-to-record state by supplying electric power to
the recording unit during a power-off state can be considered as a method for solving
this problem. However, this method cannot achieve power saving, because the HDD consumes
much power.
[0009] As another method for solving the above problem, patent document 2 describes a method
for a data processing device including a data buffer that temporarily stores data
until the HDD completes the spin-up, wherein the data stored in the data buffer is
written to the HDD after the HDD completes the spin-up. However, this method requires
the data buffer to be additionally arranged, which makes its structure more complicated
and increases the production cost.
[0010] The present invention is made in order to solve the above problems, and an object
thereof is to provide a data processing device having a simple structure to allow
a user to immediately start recording a program which the user is currently viewing
and further achieve power saving.
Means for Solving the Problems
[0011] In the present invention, a data processing device has three power states including
a power-off state, a recording standby state, and a power-on state, and when a data
processing device detects, in the power-off state, that a display device externally
connected is turned on, the data processing device changes from the power-off state
to the recording standby state, so that the above problems are solved.
[0012] The data processing device according to the present invention includes a receiving
unit operable to receive a control signal from a display device externally connected,
a signal processing unit operable to generate video data and/or audio data, a drive
unit data store the data generated by the signal processing unit to a recording medium,
a signal output unit data output a video signal and/or audio signal, a control unit
operable to control operation of the signal processing unit, the drive unit, and the
signal output unit, and a power control unit operable to control electric power supplied
to the signal processing unit, the drive unit, the signal output unit, and the control
unit.
[0013] The power control unit can control supplying of the electric power in three power
states including at least a power-off state, a recording standby state, a power-on
state. The power control unit stops the supplying of the electric power to at least
the drive unit in the power-off state, supplies to at least the drive unit and the
control unit in the recording standby state, and supplies to the signal processing
unit, the drive unit, the signal output unit, and the control unit in the power-on
state. The signal output unit stops outputting of the video signal and/or audio signal
in the power-off state and the recording standby state, and outputs the video signal
and/or audio signal in the power-on state. The power control unit switches the power
state from the power-off state to the recording standby state when the receiving unit
receivesa signal indicating that the display device is turned on, in the power-off
state. The power control unit switches the power state from the recording standby
state to the power-on state when the receiving unit receives a signal instructing
start of a recording operation or a power state confirmation signal inquiring the
power state of the data processing device from the display device, in the recording
standby state.
[0014] A power control method according to the present invention is a power control method
for the data processing device. The data processing device includes a receiving unit
operable to receive a control signal from a display device externally connected, a
signal processing unit operable to generate video data and/or audio data, a drive
unit operable to store the data generated by the signal processing unit to a recording
medium, a signal output unit operable to output a video signal and/or audio signal,
a control unit signal control operation of the signal processing unit, the drive unit,
and the signal output unit.
[0015] According to the power control method, supplying of the electric power is controlled
in three power states including at least a power-off state, a recording standby state,
a power-on state. That is, supplying of the electric power to at least the drive unit
is stopped in the power-off state, the electric power is supplied to at least the
drive unit and the control unit in the recording standby state, and the electric power
is supplied to the signal processing unit, the drive unit, the signal output unit,
and the control unit in the power-on state, and wherein the signal output unit stops
outputting of the video signal and/or audio signal in the power-off state and the
recording standby state, and outputs the video signal and/or audio signal in the power-on
state. The power state is switched from the power-off state to the recording standby
state when the receiving unit receives, in the power-off state, a signal indicating
that the display device is turned on. The power state of the data processing device
is switched from the recording standby state to the power-on state when the receiving
unit receives a signal instructing start of recording or a power state confirmation
signal inquiring the power state of the data processing device from the display device,
in the recording standby state.
Advantages of the Invention
[0016] According to the present invention, the three power states, i.e., the power-off state,
the recording standby state, and the power-on state, are switched. During the power-off
state, the electric power supplied to at least the drive unit is stopped, so that
power saving is achieved. During the recording standby state, the drive unit and the
control unit are ready to operate, and therefore, it takes less time for the drive
unit to perform spin-up when a recording start signal is received from the display
device, and a time required to start actually the recording when a user status operation
can be shortened. According to the present invention, the three power states are appropriately
switched, and therefore, a data processing device having a simple structure and achieving
power saving and a swift recording start processing upon activating the data processing
device can be realized.
Brief Description of Drawings
[0017]
Fig. 1 is a block diagram showing a system including a data processing device and
a television receiver according to an embodiment of the present invention.
Fig. 2 is a figure illustrating a display on a front panel unit and a state of electric
power supplied to a control unit, a signal output unit, and a drive unit (HDD) in
each of power states of an HDD recorder.
Fig. 3 is a transition diagram of the power states of the HDD recorder.
Fig. 4 is a communication sequence diagram when the television receiver instructs
the HDD recorder to start recording while the HDD recorder is in a power-on state.
Fig. 5 is a communication sequence diagram when the television receiver instructs
the HDD recorder to start recording while the HDD recorder is in a power-off state.
Fig. 6 is a communication sequence diagram when the television receiver instructs
the HDD recorder to start recording while the HDD recorder is in a recording waiting
state.
Fig. 7 is a communication sequence diagram when the HDD recorder switches the power
state based on a power state notification signal received from the television receiver
while the HDD recorder is in the recording standby state.
Description of Symbols
[0018]
- 1
- HDD recorder (data processing device)
- 2
- Television receiver (display device)
- 3
- HDMI interface (HDD recorder)
- 4
- HDMI interface (television receiver)
- 5
- Receiving unit
- 6
- Transmitting unit
- 7
- Power control unit
- 8
- Signal output unit
- 9
- Signal processing unit
- 10
- Drive unit
- 11
- Control unit
- 12
- Front panel unit
- 13
- HDD
- 14
- Tuner
- 15
- Antenna
Best Mode for Carrying Out the Invention
[0019] Hereinafter, an embodiment according to the present invention will be described with
reference to attached drawings.
1. System configuration and operation
[0020] Fig. 1 shows a configuration of a system including a television receiver and an HDD
recorder serving as an embodiment of a data processing device according to the present
invention. In Fig. 1, the HDD recorder 1 (data processing device) and the television
receiver 2 (display device) are connected via HDMI (High-Definition Multimedia Interface).
The HDD recorder 1 includes an HDMI Interface 3, a receiving unit 5, a transmitting
unit 6, a power control unit 7, a signal output unit 8, a signal processing unit 9,
a drive unit 10, a control unit 11, a front panel unit 12, an HDD 13, and a tuner
14. The control unit 11 executes a predetermined program to control operation of the
HDD recorder 1. The television receiver 2 has an HDMI interface 4. Both the HDD recorder
1 and the television receiver 2 receive a broadcast wave signal via an antenna 15.
[0021] The HDD recorder 1 has a function of converting the received broadcast wave signal
into video and/or audio data, and recording the data to the HDD 13 of the drive unit
10. The tuner 14 transmits the received broadcast wave signal to the signal processing
unit 9. The signal processing unit 9 converts the broadcast wave signal into the video
and/or audio data, and outputs the video and/or audio data to the signal output unit
8. The signal output unit 8 transmits the input video and/or audio data to the television
receiver 2 via the HDMI interface 3. The television receiver 2 displays and outputs
the video and/or audio data input via the HDMI interface 4.
[0022] When a user operates the HDD recorder 1 to instruct the HDD recorder 1 to change
the channel, the control unit 11 instructs the tuner 14 to tune in the channel specified
by the user. When the user operates the HDD recorder 1 to instruct the HDD recorder
1 to record a program currently received, the control unit instructs the signal processing
unit 9 to output the video and/or audio data to the drive unit 10, and the drive unit
10 records the video and/or audio data to the HDD 13. Thereafter, the drive unit 10
continues to record the video and/or audio data until stop of recording is instructed
by user's operation.
[0023] The HDD recorder 1 according to the present embodiment can be remotely operated by
a control signal by receiving the control signal from the television receiver 2. The
receiving unit 5 receives the control signal from the television receiver 2 via the
HDMI interface 3, and notifies the control unit 11 of the control signal. The control
unit 11 operates based on the control signal, and therefore, the HDD recorder 1 can
be remotely operated by the television receiver 2. The transmitting unit 6 transmits
the control signal to the television receiver 2 via the HDMI interface 3. It should
be noted that no electric power needs to be supplied to the HDMI interface 3 in the
transmission of the control signal between the HDD recorder 1 and the television receiver
2.
2. Power state of HDD recorder
[0024] The power state of the HDD recorder 1 will be hereinafter described. The HDD recorder
1 is driven by an AC power source, and has three power states, i.e., "Power-on state",
"Power-off state", and "Recording standby state". These power states are switched
by the power control unit 7. The electric power is supplied to different processing
units in accordance with the power state. Regardless of the power state of the HDD
recorder 1, the electric power is always supplied to the power control unit 7 and
the front panel unit 12. The power control unit 7 controls the supply of the electric
power to the other processing units. The front panel unit 12 always displays a display
indicating the power state of the HDD recorder 1. Hereinafter, control in each of
the power states will be described.
2.1 Control in each of the power-on states
(1) Control in the power-on state
[0025] When the HDD recorder 1 is in "Power-on state", the power control unit 7 supplies
the electric power to all processing units, i.e., the HDMI interface 3, the receiving
unit 5, the transmitting unit 6, the signal output unit 8, the signal processing unit
9, the drive unit 10, the control unit 11, the HDD 13, and the tuner 14. In this power-on
state, the HDD recorder 1 can perform all of the functions. In the power-on state,
the front panel unit displays "power-on".
(2) Control in the power-off state
[0026] When the HDD recorder is in "Power-off state", the power control unit 7 supplies
the electric power only to the receiving unit 5, the transmitting unit 6, and the
control unit 11. In this power-off state, the HDD recorder 1 cannot receive any user
operation other than "power-on", but the HDD recorder 1 can be remotely operated by
the television receiver 2 due to the supply of the electric power to the receiving
unit 5 and the transmitting unit 6. For the user using the HDD recorder 1 by remotely
operating the HDD recorder 1 from the television receiver 2, it is not necessary to
always keep the HDD recorder 1 in the power-on state. The HDD recorder 1 achieves
power saving by enabling the remote operation in the power-off state. Further, by
supplying continuously the electric power to the control unit 11 in the power-off
state, software on the control unit 11 can be activated in a shorter time, and as
a result, the entire HDD recorder 1 can start in a shorter time. If this acceleration
of starting is not necessary, it is not necessary to supply the electric power to
the control unit 11. In the power-off state, the front panel unit 12 displays "power-off".
(3) Control in the recording standby state
[0027] During the recording standby state of the HDD recorder 1, the power control unit
7 supplies the electric power to all elements, i.e., the HDMI interface 3, the receiving
unit 5, the transmitting unit 6, the signal output unit 8, the signal processing unit
9, the drive unit 10, the control unit 11, the HDD 13, and the tuner 14. In this case,
however, the signal output unit 8 halts the output of the video and/or audio data.
The front panel unit 12 displays "power-off". Therefore, the power-off state and the
recording standby state do not appear to be different to the user, and the user does
not mind the difference between the power-off state and the recording standby state.
During the recording standby state, the power control unit 7 may supply the electric
power-only to at least the drive unit 10 and the control unit 11. This is because,
if the drive unit 10 is supplied with the electric power and is ready to operate,
it takes less time to perform spin-up when the drive unit 10 is activated. Further,
this is because the control unit 11 receives various control signals from the television
receiver 2 and therefore it is necessary for the control unit 11 to be supplied with
the electric power to be ready to be activated.
[0028] More electric power is consumed in the recording standby state than in the power-off
state by the electric power supplied to the HDMI interface 3, the signal output unit
8, the signal processing unit 9, the drive unit 10, the HDD 13, and the tuner 14.
However, in the recording standby state, the electric power is supplied to the HDD
13, and accordingly, the drive unit 10 has already finished spin-up of the HDD 13
and is ready to be activated, and therefore, it takes less time to perform an activating
processing of the entire HDD recorder 1.
[0029] It should be noted that Fig. 2 shows the relation of supply of the electric power
to the control unit 11 and the drive unit 10 (including the HDD 13), out of the video
and/or audio data is output, and a display content on the front panel unit 12, in
each of the power states of the HDD recorder 1.
2.2 Transition among the power states
[0030] The transition among the three power states of the HDD recorder 1 will be described
with reference to Fig. 3.
(1) Transition from the power-off state to the recording standby state
[0031] When the HDD recorder 1 detects that the television receiver 2 is turned on, in the
power-off state, the HDD recorder 1 changes from the power-off state to the recording
standby state. For example, when the television receiver 2 is turned on, the television
receiver 2 transmits a connection confirmation signal to the HDD recorder 1. The HDD
recorder 1 detects that the television receiver 2 is turned on when receiving the
connection confirmation signal. It should be noted that the HDD recorder 1 can detect
whether the television receiver 2 is turned on, not only by detecting the connection
confirmation signal but also by detecting whether the HDD recorder 1 receives a predetermined
signal that may be output from the television receiver 2.
(2) Transition from the recording standby state to the power-off state
[0032] When the HDD recorder 1 detects that the television receiver 2 is turned off in the
recording standby state, the HDD recorder 1 changes to the power-off state. When the
television receiver 2 is turned off, the television receiver 2 transmits a power-off
signal. The HDD recorder 1 detects that the television receiver 2 is turned off when
receiving the power-off signal. Alternatively, the HDD recorder 1 may periodically
transmit a power state confirmation signal to the television receiver 2 in the recording
standby state, and the HDD recorder 1 may change to the power-off state based on a
response thereto. In particular, the HDD recorder 1 receives a power state notification
signal from the television receiver 2in reply to the power state confirmation signal.
In a case where the power state notification signal received from the television receiver
2 indicates "Power-off", the HDD recorder 1 recognizes that the television receiver
2 is turned off, and the HDD recorder 1 changes from the recording standby state to
the power-off state. In a case where the HDD recorder 1 cannot receive the power state
notification signal from the television receiver 2 in reply to the power state confirmation
signal in the recording standby state, the HDD recorder 1 recognizes that the remote
operation function via the HDMI is invalidated, and in a case where the HDD recorder
1 fails to transmit the power state confirmation signal, the HDD recorder 1 recognizes
that the connection with the television receiver 2 via the HDMI is disconnected, and
then the HDD recorder 1 changes from the recording standby state to the power-off
state. The details of this sequence will be described later.
(3) Transition from the recording standby state to the power-on state
[0033] When the control unit 11 receives an instruction to turn on the HDD recorder 1 provided
by the user on the front panel unit 12 (or a remote controller) in the recording standby
state, the HDD recorder 1 changes from the recording standby state to the power-on
state. When the HDD recorder 1 receives "Power-on signal", i.e., a signal (command)
for turning on the HDD recorder 1 via remote operation, or "Recording start signal",
i.e., a signal for instructing the HDD recorder 1 to start recording operation from
the television receiver 2 , in the recording standby state, the HDD recorder 1 changes
to the power-on state. When the HDD recorder 1 receives "Power state confirmation
signal", i.e., a signal for inquiring the power state of the HDD recorder 1 from the
television receiver 2, in the recording standby state, HDD recorder 1 may change to
the power-on state.
[0034] In this way, the HDD recorder 1 changes to the recording standby state only while
the user views the television receiver 2. Therefore, it takes less time to start recording
while power saving is achieved.
(4) Transition from the power-off state to the power-on state
[0035] The HDD recorder 1 changes from the power-off state to the power-on state in the
following cases. When the control unit 11 receives an instruction to turn on the HDD
recorder 1 provided by the user on the front panel unit 12 (or the remote controller),
in the power-off state, the HDD recorder 1 changes from the power-off state to the
power-on state. When the HDD recorder 1 receives "Power-on signal" for turning on
the HDD recorder 1 via remote operation from the television receiver 2, in the power-off
state, the HDD recorder 1 changes to the power-on state.
(5) Transition from the power-on state to the power-off state
[0036] The HDD recorder 1 changes from the power-on state to the power-off state in the
following cases. When the control unit receives, in the power-on state, an instruction
to turn off the HDD recorder 1 provided by the user on the front panel unit 12 (or
the remote controller), the HDD recorder 1 changes from the power-off state to the
power-on state. When the HDD recorder 1 receives, in the power-off state, from the
television receiver 2 "Power-off signal" for turning off the HDD recorder 1 via remote
operation from the television receiver 2, in the power-off state, the HDD recorder
1 changes to the power-off state.
2.3 Operation in each of the power states
[0037] The television receiver 2 has a function of converting the received broadcast wave
signal into the video and/or audio data to and display the video and/or audio data.
The user can view a broadcast program using the television receiver 2. The television
receiver 2 transmits the control signal to the HDD recorder 1 via the HDMI interface
4 to allow the HDD recorder 1 to immediately start recording program data being displayed
on the television receiver 2. At this moment, the communication sequence between the
HDD recorder 1 and the television receiver 2 differs according to the power state
of the HDD recorder 1. The communication sequence will be hereinafter described.
(1) In a case where the HDD recorder is in the power-on state
[0038] A processing for starting recording a program being viewed on the television receiver
2 while the HDD recorder 1 is in the power-on state will be described. Fig. 4 shows
a communication sequence in this occasion.
[0039] When the user operates the television receiver 2 to instruct the HDD recorder 1 to
record the program being displayed, the television receiver 2 transmits to the HDD
recorder 1 the power state confirmation signal for inquiring the power state of the
HDD recorder 1 (S01). The receiving unit 5 receives the power state confirmation signal
and notifies the control unit 11 of the power state confirmation signal. The control
unit 11 confirms the power state of the HDD recorder 1 and notifies the transmitting
unit 6 of the confirmation result. In this case, the HDD recorder 1 is in the power-on
state, and accordingly, the transmitting unit 6 transmits to the television receiver
2 the power state notification signal indicating "Power-on" (S02). The television
receiver 2 which received the power state notification signal (power-on) recognizes
that the HDD recorder 1 is in the power-on state. Thereafter, the television receiver
2 transmits a recording start signal to the HDD recorder 1 (S03). The receiving unit
5 which received the recording start signal notifies the control unit 11 of the recording
start signal. The control unit 11 performs a tune-in processing to a channel specified
by the recording start signal, and thereafter, starts a recording start processing.
After the recording processing actually starts, the control unit 11 transmits a recording
start result to the transmitting unit 6, and the transmitting unit 6 transmits a recording
start result notification signal to the television receiver 2 (S04).
(2) In a case where the HDD recorder is in the power-off state
[0040] A processing for starting recording a program which a user is viewing on the television
receiver 2 while the HDD recorder 1 is in the power-off state will be described. Fig.
5 shows a communication sequence in this occasion.
[0041] When the user operates the television receiver 2 to instruct the HDD recorder 1 to
record the program being displayed, the television receiver 2 transmits to the HDD
recorder 1 the power state confirmation signal (S05). The receiving unit 5 receives
the power state confirmation signal and notifies the control unit 11 of the power
state confirmation signal. The control unit 11 confirms the power state of the HDD
recorder 1 and notifies the transmitting unit 6 of the confirmation result. In this
case, the HDD recorder 1 is in the power-off state, and accordingly, the transmitting
unit 6 transmits the power state notification signal indicating "Power off" to the
television receiver 2 (S06). The television receiver 2 receiving the power state notification
signal (power-off) recognizes that the HDD recorder 1 is in the power-off state, and
the television receiver 2 transmits to the HDD recorder 1 "Power-on signal", i.e.,
a control signal for turning on the HDD recorder 1 (S07). When the HDD recorder 1
receives the power-on signal, the HDD recorder 1 starts the activating processing.
Namely, the power control unit 7 starts the supplying of the electric power to the
HDMI interface 3, the signal output unit 8, the signal processing unit 9, the drive
unit 10, the HDD 13, and the tuner 14. After the television receiver 2 transmits the
power-on signal, the television receiver 2 transmits a power state confirmation signal
to the HDD recorder 1 (S08). The HDD recorder 1 replies a power state notification
signal indicating "starting" in reply to the power state confirmation signal from
a time which the activating processing starts to a time which the activating processing
finishes (S09). The television receiver 2 periodically transmits the power state confirmation
signal to the HDD recorder 1 until the television receiver 2 receives from the HDD
recorder 1 the power state notification signal indicating "Power-on".
[0042] When the HDD recorder 1 finishes the activating processing of the HDD recorder 1,
the HDD recorder 1 replies the power state notification signal indicating "Power-on"
in reply to the power state confirmation signal transmitted from the television receiver
2 (S11). Thereafter, the television receiver 2 transmits the recording start signal
to the HDD recorder 1 (S12). When the receiving unit 5 receives the recording start
signal, the receiving unit 5 notifies the control unit 11 of the recording start signal.
After the control unit 11 performs a tune-in processing to a channel specified by
the recording start signal, the control unit 11 starts the recording start processing.
After the recording processing actually starts, the control unit 11 notifies the transmitting
unit 6 of the recording start result, and the transmitting unit 6 transmits the recording
start result notification signal to the television receiver 2 (S13).
[0043] As described above, in a case where the HDD recorder 1 is in the power-off state,
the television receiver 2 transmits the power-on signal, and the HDD recorder 1 receives
the power-on signal starts the activating processing. At this moment, the power control
unit 7 starts the supplying of the electric power to the HDMI interface 3, the signal
output unit 8, the signal processing unit 9, the drive unit 10, the HDD 13, and the
tuner 14, and the activating processing starts in each of the processing units. The
activating processing of the entire HDD recorder 1 finishes after all of the processing
units finishes the activating processing. It takes about 8 to 20 seconds for the HDD
13 to perform spin-up, and therefore, it takes especially a long time to perform the
activating processing of the drive unit 10. As a result, there is a problem in that,
even if the user operates the television receiver 2 to immediately record a program
which the user is viewing on the television receiver 2, the first about 8 to 20 seconds
cannot be actually recorded.
[0044] Considering the above, the present embodiment is arranged with the recording standby
state in addition the power-on state and the power-off state as the power states of
the HDD recorder 1 as described above. Next, operation in a case where the HDD recorder
1 is in the recording standby state will be described.
(3) In a case where the HDD recorder is in the recording standby state
3-1) Processing when a recording start request is received from the television receiver
[0045] A processing for starting recording a program which a user is viewing on the television
receiver 2 while the HDD recorder 1 is in the recording standby state will be described.
Fig. 6 shows a communication sequence in this occasion.
[0046] When the user operates the television receiver 2 to instruct the HDD recorder 1 to
record the program being displayed, the television receiver 2 transmits to the HDD
recorder 1 the power state confirmation signal (S14). The receiving unit 5 receives
the power state confirmation signal and notifies the control unit 11 of the power
state confirmation signal. The control unit 11 confirms the power state of the HDD
recorder 1 and notifies the transmitting unit 6 of the confirmation result. In this
case, the HDD recorder 1 is in the recording standby state, but for the sake of simplifying
the communication sequence and making the overall processing faster, the transmission
unit 6 transmits the power state notification signal indicating "Power-on" to the
television receiver 2 (S15). The television receiver 2 which received the power state
notification signal (power-on) recognizes that the HDD recorder 1 is in the power-on
state. Thereafter, the television receiver 2 transmits the recording start signal
to the HDD recorder 1 (S16). When the receiving unit 5 receives the recording start
signal, the receiving unit 5 notifies the control unit 11 of the recording start signal,
so that the activating processing of the HDD recorder 1 starts. At this moment, the
drive unit 10 has already been supplied with the electric power and is ready to operate.
Namely, it takes less time for the drive unit 10 to perform spin-up, and a time T'
required to perform the activating processing at this occasion is less than a time
T (see Fig. 5) required to start the HDD recorder 1 from the power-off state. When
the activating processing finishes, the control unit 11 performs a tune-in processing
to a channel specified by the recording start signal, and thereafter, the control
unit 11 starts the recording start processing. After the recording processing actually
starts, the control unit 11 notifies the transmitting unit 6 of the recording start
result, and the transmitting unit 6 transmits the recording start result notification
signal to the television receiver 2 (S17).
[0047] In the recording standby state (see S15), the HDD recorder 1 transmits the power
state signal indicating "Power-on" in reply to the power state confirmation signal
transmitted from the television receiver 2, but the HDD recorder 1 may transmit the
power state signal indicating "Power-off". Further, the HDD recorder 1 may start the
activating processing without waiting for the recording start signal when the HDD
recorder 1 receives the power state confirmation signal transmitted from the television
receiver 2 at first (at the time of A in Fig. 6).
3-2) Switching processing of the power state based on the power state notification
signal received from the television receiver
[0048] Next, a switching processing of the power state when the television receiver 2 is
turned off while the HDD recorder 1 is in the recording standby state will be described.
Fig. 7 shows a communication sequence at this occasion.
[0049] The transmitting unit 6 of the HDD recorder 1 transmits to the television receiver
2 a power state confirmation signal for inquiring the power state of the television
receiver 2 (S21). In reply to the power state confirmation signal, the television
receiver 2 transmits to the HDD recorder 1 the power state notification signal for
notifying about the power state of the television receiver 2 (S22). In S22, the television
receiver 2 transmits the power state notification signal notifying that the television
receiver 2 is "Power-on". When the receiving unit 5 of the HDD recorder 1 receives
the power state notification signal from the television receiver 2, the receiving
unit 5 notifies the control unit 11 of the power state notification signal. The control
unit 11 recognizes that the television receiver 2 is turned on from the fact that
the power state notification signal indicating "Power-on" is received, and notifies
the power control unit 7 of the determination result. The power control unit 7 receives
the determination result and maintains the recording standby state. The HDD recorder
1 periodically transmits the power state confirmation signal to the television receiver
2.
[0050] When the television receiver 2 turned off, the television receiver 2 transmits the
power state notification signal indicating "Power-off" to the HDD recorder 1 (S24)
in reply to the power state confirmation signal transmitted by the HDD recorder 1
(S23). When the receiving unit 5 of the HDD recorder 1 receives the power state notification
signal indicating "Power-off", the receiving unit 5 notifies the control unit 11 of
the power state notification signal. The control unit 11 recognizes that the television
receiver 2 is turned off from the fact that the power state notification signal indicating
"Power-off" is received, and notifies the power control unit 7 of the determination
result. The power control unit 7 receives the determination result, and switches the
power state from the recording standby state to the power-off state. In a case where
the supply of the electric power to the television receiver 2 is cut due to power
failure and other failures, or in a case where the remote operation function of the
television receiver 2 via the HDMI is invalidated, the television receiver 2 does
not transmit the power state notification signal in reply to the power state confirmation
signal. Therefore, when the control unit 11 of the HDD recorder 1 does not receive
the power state notification signal from the television receiver 2 even after a predetermined
time passes since the power state confirmation signal was last transmitted (S25),
the control unit 11 recognizes that the television receiver 2 is turned off or that
the television receiver 2 is not configured to remotely operate the HDD recorder 1,
and notifies the power control unit 7 of the determination result. In a case where
the HDD recorder 1 fails to transmit the power state confirmation signal, the control
unit 11 recognizes that the connection with the television receiver 2 via the HDMI
is disconnected, and notifies the power control unit 7 of the determination result.
In these cases, the power control unit 7 also changes the power state from the recording
standby state to the power-off state.
[0051] It should be noted that it is not necessary to set a special signal as the power
state confirmation signal, and a signal always output to the HDD recorder 1 when the
television receiver 2 is turned on may be monitored. In this case, the control unit
11 of the HDD recorder 1 can recognize that the television receiver 2 is turned on
while the monitored signal is received, and can recognize that the television receiver
2 is turned off when the monitored signal can no longer be received.
3. Summary
[0052] As described above, the HDD recorder 1 according to the present embodiment is arranged
with the three power states (power-on state/power-off state/recording standby state)
as power supply states. In particular, the HDD recorder 1 is arranged with the recording
standby state in which the HDD recorder 1 stops video/audio output to the television
receiver 2 so that the HDD recorder 1 appears to be "Power-off" while the electric
power is supplied to the control unit 11 and the drive unit 10 (HDD 13). In the recording
standby state in which the control unit 11 is supplied with the electric power, the
television receiver 2 can remotely operate the HDD recorder 1. In the recording standby
state in which the drive unit 11 (HDD 13) is also supplied with the electric power,
it takes less time for the drive unit 10 (HDD 13) to perform spin-up when the recording
start signal is received from the television receiver 2, so that it takes less time
to finish the activating processing. In the power-off state, at least the electric
power supplied to the drive unit is stopped, and accordingly, power saving is achieved.
Therefore, the power-off state and the recording standby state are appropriately switched
in accordance with the usage situation of the HDD recorder 1 and the television receiver
2, so that the recording start processing upon activating the data processing device
can be performed swiftly while power saving is achieved.
[0053] In the above description, the recording medium of the HDD recorder 1 is the HDD (hard
disk device), but the recording medium may also be an optical disk such as a DVD (Digital
Versatile Disk) and a BD (Blue-ray Disc).
[0054] Further, the control unit 11 may be divided into two control units, i.e., a control
unit for controlling display on the front panel unit 12 and a control unit for controlling
the units other than the front panel unit 12. In this case, in the power-off state,
the electric power is preferably supplied to the control unit for controlling display
on the front panel unit 12, and the electric power is preferably not supplied to the
control unit for controlling the units other than the front panel unit 12.
Industrial Applicability
[0055] In the present invention, when the data processing device including a recording medium
therein such as an HDD that takes much time to be activated is remotely operated by
a display device and the like, the data processing device can be activated in a shorter
time and achieve power saving. Therefore, the present invention is effective for a
data processing device such as an HDD recorder including a recording medium therein
that takes much time to be activated.
1. A data processing device comprising:
a receiving unit operable to receive a control signal from a display device externally
connected;
a signal processing unit for operable to generate video data and/or audio data;
a drive unit operable to store the data generated by the signal processing unit to
a recording medium;
a signal output unit operable to output a video signal and/or audio signal; and
a control unit operable to control operation of the signal processing unit, the drive
unit, and the signal output unit;
the data processing device further comprising:
a power control unit operable to control electric power supplied to the signal processing
unit, the drive unit, the signal output unit, and the control unit,
wherein the power control unit can control supplying of the electric power in three
power states including at least a power-off state, a recording standby state, a power-on
state, and
wherein the power control unit stops the supplying of the electric power to at least
the drive unit in the power-off state, supplies the electric power to at least the
drive unit and the control unit in the recording standby state, and supplies the electric
power to the signal processing unit, the drive unit, the signal output unit, and the
control unit in the power-on state, and
wherein the signal output unit stops outputting of the video signal and/or audio signal
in the power-off state and the recording standby state, and outputs the video signal
and/or audio signal in the power-on state, and
wherein the power control unit switches the power state from the power-off state to
the recording standby state when the receiving unit receives a signal indicating that
the display device is turned on, in the power-off state, and
wherein the power control unit switches the power state from the recording standby
state to the power-on state when the receiving unit receives a signal instructing
start of a recording operation or a power state confirmation signal inquiring the
power state of the data processing device from the display device, in the recording
standby state.
2. The data processing device according to claim 1 further comprising a front panel unit
operable to display the power state.
3. The data processing device according to claim 2, wherein the front panel unit displays
that the power of the data processing device is off in the power-off state.
4. The data processing device according to claim 2, wherein the front panel unit displays
that the power of the data processing device is off in the recording standby state.
5. The data processing device according to claim 1 further comprising a transmitting
unit operable to transmit a control signal to the display device externally connected,
wherein the transmitting unit periodically transmits a power state confirmation signal
inquiring a power state of the display device to the display device, in the recording
standby state,.
6. The data processing device according to claim 5, wherein, in the recording standby
state, the power control unit changes the power state from the recording standby state
to the power-off state, when the receiving unit receives a signal indicating that
the power of the display device is off in reply to the power state confirmation signal,
when the receiving unit does not receive a reply signal from the display device within
a predetermined time since the power state confirmation signal is transmitted, or
when transmission of the power state confirmation signal fails.
7. The data processing device according to claim 1, wherein the power control unit changes
the power state from the recording standby state to the power-off state when the receiving
unit receives from the display device a signal indicating that the display device
is turned off, in the recording standby state.
8. The data processing device according to claim 1, wherein the power control unit changes
the power state from the recording standby state to the power-on state when the receiving
unit receives, a signal for turning on the data processing device from the display
device, in the recording standby state.
9. The data processing device according to claim 1, wherein the power control unit changes
the power state from the power-off state to the power-on state when the receiving
unit receives a signal for turning on the data processing device from the display
device, in the power-off state.
10. A power control method for a data processing device including a receiving unit operable
to receive a control signal from a display device externally connected, a signal processing
unit operable to generate video data and/or audio data, a drive unit operable to store
the data generated by the signal processing unit to a recording medium, a signal output
unit operable to output a video signal and/or audio signal, and a control unit signal
control operation of the signal processing unit, the drive unit, and the signal output
unit,
the power control method comprising:
controlling supplying of electric power in three power states including at least a
power-off state, a recording standby state, a power-on state;
supplying the electric power to at least the drive unit is stopped in the power-off
state, supplying the electric power to at least the drive unit and the control unit
in the recording standby state, and supplying the electric power to the signal processing
unit, the drive unit, the signal output unit, and the control unit in the power-on
state, and wherein the signal output unit stops outputting of the video signal and/or
audio signal in the power-off state and the recording standby state, and outputs the
video signal and/or audio signal in the power-on state;
switching the power state from the power-off state to the recording standby state
when the receiving unit receives a signal indicating that the display device is turned
on, in the power-off state,; and
switching the power state of the data processing device from the recording standby
state to the power-on state when the receiving unit receives a signal instructing
start of recording or a power state confirmation signal inquiring the power state
of the data processing device from the display device, in the recording standby state.